Bottles of "designer" HP Sauce go on sale at Harrods in London today as part of the store's Truly British season.

They cost £2.95 each compared with 69p for the same size 255ml bottle with an ordinary HP label from Sainsbury's.

Charity

Some 10 per cent of the proceeds will go to the baby charity Tommy's which funds medical research and provides parents with pregnancy and birth information.

To mark the fact that the sauce came into existence in 1899, HP has produced 1,899 of the limited edition bottles.

Each one will be numbered and come with its own certificate of authentication.

Paul Smith said: "As part of Harrods' Truly British season, I was invited to work with HP on an exclusive project. Customising the HP label was a great way for me to be part of this celebration of all things British."

The limited edition bottles will be on sale at Harrods from today until October 15.